Material handling devices for underground mines
By: by Ernest J. Conway and Richard L. Unger.
Contributors: Unger Richard L.
Series: Information circular / United States Dept. of the Interior, Bureau of Mines ;; 9212; Information circular (United States. Bureau of Mines) ;; 9212.
Publisher: U.S. Dept. of the Interior, Bureau of Mines
Published: 1988
Place of publication: Pgh. [i.e. Pittsburgh] Pa
Language: eng
Number of pages: 48
Subjects: Coal mining machinery.